TKalculator™ is a scientific calculator supporting calculations with real and complex numbers, with capabilities to plot 2D and 3D equations, matrices, polynomials, linear equations solver, statistical analysis of linear regression models and more.

Main features:

- Complete scientific calculator yet simple and easy to use.
- Full support for Real and Complex math calculations with a large range of functions for Complex numbers.
- Support for “real & imaginary” or “magnitude & angle” complex formats.
- Polynomial equation solver supporting up to 100-degree polynomials with real or complex coefficients.
- Support for matrix calculations with real and complex entries.
- System of linear equations solver.
- Drag/slide for scrolling the graph and pinch to zoom in real time.
- Supports graphing of parametric and polar equations.
- Find equations roots, trace points, maxima and minima and intersection points.
- Support for 3D surface graphs.
- Support for multiple equations (10) on the same graph (2D).
- See how the shape of an equation in the rectangular coordinate system looks like in the polar form and vice-versa.
- Support for plotting Cartesian equations along the vertical axis (X=f(Y)) and trace constants equations (horizontal and vertical lines).
- Statistical support for simple linear regression (with 2 variables) with validation of the regression model by the T-Test method and Analysis Of Variance (ANOVA).
- Support for user variables (eg T:=5, calculate T+T/2).
- User manual available.